صفحه 1 از جانب 32 نتایج
Soft tissue sarcomas (STS) represent a rare group of malignant tumors that frequently exhibit chemotherapeutic resistance and increased metastatic potential. Many studies have demonstrated the great potential of plant-derived agents in the treatment of various malignant entities. The present study
Human soft tissue sarcomas represent a rare group of malignant tumours that frequently exhibit chemotherapeutic resistance and increased metastatic potential following unsuccessful treatment. In this study, we investigated the effects of costunolide and dehydrocostus lactone, which have been
The proliferative activity and lipid composition (phospholipids, gangliosides) were studied in rat cholangiocarcinoma RS1 and sarcoma M1 transplanted subcutaneously or intrahepatically. The mitotic index was higher in the tumors transplanted into the heterologous organ. The total phospholipid and
Hymenoxon, a toxic sesquiterpene lactone found in bitterweed, bound deoxyguanosine in a cell-free system and formed adducts with guanine residues in cellular DNA. The reactive dialdehyde form of hymenoxon formed stable Schiff base products with deoxyguanosine which were separable from unreacted
Some alpha-methylene-gamma-lactone derivatives of substituted nucleic acid bases, which showed significant antitumour activity against experimental tumours, were tested for their possible mechanism of action. Derivatives 1, 4 and 7 strongly inhibit active transport of uridine through sarcoma-180
The anticancer property of a new alpha-methylene-gamma-lactone derivative of phthalimide (2, NSC 640168) was evaluated in two murine ascitic tumors namely Ehrlich ascites carcinoma (EAC) and sarcoma-180 (S-180) by in vivo screenings and in a battery of human tumor cell lines by in vitro screening.
OBJECTIVE
To study the relationship between the lactone forms of 10-hydroxycamptothecin (HCPT) and their antitumor activities.
METHODS
Antitumor activity of the two forms of HCPT was studied in vitro using seven cultured human and mouse tumor cell lines. Mice bearing sarcoma 180 and solid hepatoma
The in vitro cytotoxicity of norditerpenoid dilactones isolated from Podocarpus plants was determined against cultured Yoshida sarcoma cells. The dilactones involved 15 natural lactones as well as their derivatives, which include appropriate modifications necessary to the estimation of the
OBJECTIVE
Melanomas, sarcomas, and neuroblastomas abundantly express the ganglioside GD2 on the cell surface where it is susceptible to immune attack by antibodies. Overexpression of GD2 on these tumors is striking, as is the frequency of clinical responses after treatment of neuroblastoma with
Mouse sarcoma 180 (S-180) solid and ascites tumor cells were treated in vivo and in vitro with withaferin A and observed with the electron microscope. The compound was found to effect this spindle microtubules of cells in metaphase. An interesting finding was the double membranes surrounding the
Exatecan mesylate (DX-8951f) is a new hexacyclic camptothecin analogue with favorable attributes compared to topotecan and CPT-11, including watersolubility, greater potency against topoisomerase I, lack of esterase-dependent activation, broad antitumor activity, and low cross-resistance against
OBJECTIVE
This phase I study endeavored to estimate the maximum tolerated dose and describe the dose-limiting toxicities (DLTs) of oral irinotecan with gefitinib in children with refractory solid tumors.
METHODS
Oral irinotecan was administered on days 1-5 and 8-12 with oral gefitinib (fixed dose,
Heparan sulfate (HS), a prominent component of vascular endothelial basal lamina, is cleaved into large Mr fragments and solubilized from subendothelial basal lamina-like matrix by metastatic murine B16 melanoma cells. We have examined the degradation products of HS and other purified
The aim of this study was to evaluate the mechanisms of cytotoxicity of the sesquiterpene lactone 13-acetoxyrolandrolide, a nuclear factor kappa B (NF-κB) inhibitor that was previously isolated from Rolandra fruticosa. The effects associated with the inhibition of the NF-κB pathway included
Oral administration of 8-methoxypsoralen followed by exposure to longwave ultraviolet light (primarily ultraviolet A, 320-400 nm) is used in the treatment of vitiligo and psoriasis. 8-Methoxypsoralen also occurs naturally in a variety of vegetables. Toxicology and carcinogenesis studies of